I have the AttoPilot 90A voltage monitor and it stopped working a few weeks ago (with version 2.6) on my APM2.
It was working with 2.6 and than stopped and it still isn't working with 2.7. The problem seems to be that where I put which attopilot I have keeps going back to 0. Does anyone know where this information is stored on the quad? or is my problem something else?